freeCodeCamp/curriculum/challenges/en/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.en.md

id, title, challengeType

id	title	challengeType
56bbb991ad1ed5201cd392d2	Add New Properties to a JavaScript Object	1

Description

You can add new properties to existing JavaScript objects the same way you would modify them. Here's how we would add a "bark" property to ourDog: ourDog.bark = "bow-wow"; or ourDog["bark"] = "bow-wow"; Now when we evaluate ourDog.bark, we'll get his bark, "bow-wow".

Instructions

Add a "bark" property to myDog and set it to a dog sound, such as "woof". You may use either dot or bracket notation.

Tests

- text: Add the property <code>"bark"</code> to <code>myDog</code>.
  testString: 'assert(myDog.bark !== undefined, ''Add the property <code>"bark"</code> to <code>myDog</code>.'');'
- text: Do not add <code>"bark"</code> to the setup section
  testString: 'assert(!/bark[^\n]:/.test(code), ''Do not add <code>"bark"</code> to the setup section'');'

Challenge Seed

// Example
var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"]
};

ourDog.bark = "bow-wow";

// Setup
var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"]
};

// Only change code below this line.

After Test

console.info('after the test');

Solution

var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"]
};
myDog.bark = "Woof Woof";